The NEC UX5000 SLT Adapter converts a digital port from a digital station card into an analog port which can be used for connecting on-premise 2500 type single line devices (i.e., telephones, fax machines, modems, etc.).

Caller ID is supported by these adapters.

The SLT Adapter provides the ring generator circuit used by the analog device. The unit provides constant current which is fixed at 47 mA. Each SLT Adapter requires its own digital port.